mirror of
https://github.com/imjasonh/nescript
synced 2026-07-08 17:06:04 +00:00
07dd5bd7e8
Fuzz targets (cargo +nightly fuzz):
- fuzz_lexer: lexer must never panic on arbitrary input
- fuzz_parser: parser must never panic on arbitrary input
- fuzz_compile: full pipeline (parse → analyze → IR → optimize →
codegen → assemble → link) must never panic
Results: 3.3M iterations across all targets, zero crashes.
Seed corpus from all 7 examples + crafted edge cases.
11 new parser edge case tests:
- draw_followed_by_statement: regression for keyword-arg lookahead bug
- draw_with_frame_followed_by_statement: same with frame: arg
- nested_if_else_chain: 3-deep else-if chain
- deeply_nested_blocks: 4-deep nested if blocks
- empty_function_body: fun noop() {}
- empty_state_handlers: on enter/exit/frame {}
- button_start_in_condition: "start" keyword as button name
- button_select_in_condition: "select" keyword as button name
- multiple_draws_in_sequence: 3 draws followed by assignment
- parser_no_panic_on_garbage: 25 malformed inputs
- lexer_no_panic_on_garbage: 10 malformed inputs
221 tests total, all pre-commit checks pass.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
33 lines
1.1 KiB
Rust
33 lines
1.1 KiB
Rust
#![no_main]
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use libfuzzer_sys::fuzz_target;
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fuzz_target!(|data: &[u8]| {
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// The full compilation pipeline must never panic — errors are reported
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// via diagnostics, not panics.
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if let Ok(source) = std::str::from_utf8(data) {
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let (program, parse_diags) = nescript::parser::parse(source);
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if parse_diags.iter().any(|d| d.is_error()) {
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return;
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}
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let Some(program) = program else { return };
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let analysis = nescript::analyzer::analyze(&program);
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if analysis.diagnostics.iter().any(|d| d.is_error()) {
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return;
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}
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// IR lowering + optimization
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let mut ir = nescript::ir::lower(&program, &analysis);
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nescript::optimizer::optimize(&mut ir);
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// Codegen + assembly
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let codegen =
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nescript::codegen::CodeGen::new(&analysis.var_allocations, &program.constants);
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let instructions = codegen.generate(&program);
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// Linking
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let linker = nescript::linker::Linker::new(program.game.mirroring);
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let _rom = linker.link(&instructions);
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}
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});
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